How Linked In are you?

Getting through my last semester of college I have been more and more concentrated on getting an actual job instead of just working at the university's mail room for the rest of my life. As I have been looking for a job and asking people if they know any good companies to work for they always ask me the same question. "Do you have a LinkedIn profile?" Admittedly I do have a LinkedIn profile but I never really use it for what is meant to be used for. I have been thinking more and trying to figure out how many people my age actually use this social media site. I have been asking around some of my friend group and it seems that most of them have a profile but never really use it or barely look at it. I decided to look up more facts about LinkedIn and I was actually shocked what I found. One of the craziest facts I found was that on average 2 new users sign up for a LinkedIn profile every second. That was completely unexpected. What I found more shocking was that according to LinkedIn around 64% of users are based outside the United States. So I decided to keep my ears open around the school of business and see how often this site actually comes up in conversation. I wasn't as surprised what I noticed. Though many people have a profile, no one really talks about this site and it isn't "all the rave' like twitter or Facebook  Since this is a professional site, what would happen if people started treating LinkedIn as the next Facebook? Would employers stop using it to look for credentials? Would it have a negative impact on the job market? These are all questions that would probably come up if this site went down that road.